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Irtyshite

Additional Functions

Collectors Summary

Hardness (Mohs) 6.75
Crystal System hexagonal, P63/m, P63

Chemism

Chem­ical formula

Na2(Ta,Nb)4O11

Chem­ical com­po­si­tion

Natrium, Niob, Tantal, Sauerstoff

Unit weight: 857.7233824 u; Number of atoms in the formula: 17

Info

Empirical formula:

Na2(Ta0.75Nb0.25)4O11

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

20.52

11

64.71

15.9994300

175.9937300

Sodium

Na

5.36

2

11.76

22.9897702

45.9795404

Niobium

Nb

10.83

1

5.88

92.9063820

92.9063820

Tantalum

Ta

63.29

3

17.65

180.9479100

542.8437300

Anal­y­sis wt%

Ø Na2O : 6.46, PbO : 0.41, SnO2 : 0.58, Nb2O5 : 12.07, Ta2O5 : 80.00 (Ref: Mineralogicheskii Zhurnal 85)

Strunz 9th edi­tion incl. updates

4.DJ.05

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
J: Mit großen (± mittelgroßen) [Kationen]; vielgestaltige (polyhedrale) Gerüste
05:Natrotantit-Gruppe

Lapis Clas­sifica­tion

IV/D.26-030

IV: OXIDE
D: Oxide mit Verhältnis Metall : Sauerstoff = 1:2 (MO2 und verwandte Verbindungen)

Clas­sifica­tion by Hölzel

4.DJ.500

4: OXIDES
D: Dioxides
J: Titanates, Niobates and Tantalates, C large, V medium ò 2
5: Other Niobates, Tantalates

Dana 8th edi­tion

08.06.02.03

08: Multiple Oxides with Nb, Ta, and Ti
06: Multiple Oxides with Nb, Ta, and Ti
02: Calciotantite Group

IMA sta­tus

anerkannt

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

RI value α / ω / n

2.179

RI value γ / ε

mean

Ri mean

2.179

2V angle

Uniaxial

Crystallography

Crystal Sys­tem

hexagonal

Class (H-M)

6/m, 6

Space Group number

176, 173

Space Group

P63/m, P63

Cell param­e­ters a (Å)

6.231

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

36.77

Cell param­e­ters a/b or c/a

5.901

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

120°

Z

6

Volumne (ų)

1236.345

X-Ray Pow­der Diffrac­tion

6.13(70),
5.18(60),
3.082(90),
3.029(100),
2.780(90),
2.480(60),
1.929(40),
1.802(40)

XRD chart Irtyshite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Physical Properties

Hard­ness (Mohs)

6.75

VHN (Hard­ness Vick­ers)

1110 (30g)

Density (g/cm³)

7.03 (berechnet)

6.912 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Voloshin & Pakhomovskiy & Bulgak & Perlina, 1985

References

American Mineralogist (1986): 71: 1545.

Strunz Mineralogical Tables 9. Edition (2001), 225.

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Irtyshite

Na2(Ta,Nb)4O11

hexagonal : 6/m, 6 : P63/m, P63

4.DJ.05

'Ungursaite'

Ca(Ta,Nb)4O11

hexagonal : 6, 6/m : P63, P63/m

4.DJ.05

Natrotantite

Na2Ta4O11

trigonal : 3m : R3c

4.DJ.05

Calciotantite

CaTa4O11

hexagonal : 622 : P6322

4.DJ.05

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Lithiotantite

Li(Ta,Nb)3O8

monoklin : 2/m : P21/c

IV/D.26-010

Natrotantite

Na2Ta4O11

trigonal : 3m : R3c

IV/D.26-020

Irtyshite

Na2(Ta,Nb)4O11

hexagonal : 6/m, 6 : P63/m, P63

IV/D.26-030

Calciotantite

CaTa4O11

hexagonal : 622 : P6322

IV/D.26-040

Cesplumtantite

(Cs,Na)2(Pb,Sb3+)3Ta8O24

IV/D.26-060

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Irtyshite

Na2(Ta,Nb)4O11

hexagonal : 6/m, 6 : P63/m, P63

4.DJ.500

Cesplumtantite

(Cs,Na)2(Pb,Sb3+)3Ta8O24

4.DJ.510

'Ungursaite'

Ca(Ta,Nb)4O11

hexagonal : 6, 6/m : P63, P63/m

4.DJ.530

Calciotantite

CaTa4O11

hexagonal : 622 : P6322

4.DJ.540

Petscheckite

U4+Fe2+Nb2O8

trigonal : 3m : P31m

4.DJ.560

Liandratite

U6+(Nb,Ta)2O8

trigonal : 3m : P31m

4.DJ.570

Murataite-(Y)

(Y,Na)6(Zn,Fe3+)5(Ti,Nb)12(O,F,OH)43

kubisch : 43m : F43m

4.DJ.580

Changbaiite

PbNb2O6

trigonal : 3m : R3m

4.DJ.590

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Franconite

Na2Nb4O11·9H2O

08.06.01.01

Hochelagaite

(Ca,Na,Sr)Nb4O11·8H2O

08.06.01.02

Ternovite

MgNb4O11·8-12H2O

monoklin : 2, m, 2/m : P2, Pm, P2/m

08.06.01.03

Calciotantite

CaTa4O11

hexagonal : 622 : P6322

08.06.02.01

Natrotantite

Na2Ta4O11

trigonal : 3m : R3c

08.06.02.02

Irtyshite

Na2(Ta,Nb)4O11

hexagonal : 6/m, 6 : P63/m, P63

08.06.02.03

IMA Number

IMA 1984-025

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